Requirements for hydraulic oil performance of grader, maintenance skills of hydraulic system of grader

Mar 29,2023

Requirements for hydraulic oil performance of grader In hydraulic transmission, hydraulic oil is not only a medium for transmitting power, but also a lubricant. It also plays a sealing role in some components. The heat in the system is also diffused through the oil, so it also plays a role in heat dissipation. Therefore, in order to ensure the reliable, effective and economical work of the hydraulic system, the hydraulic oil must ensure the following requirements: 1. Appropriate viscosity. Viscosity is the size of the friction resistance between molecules when the oil flows. When the viscosity is too large, the resistance of the oil flow is large, the energy loss is large, and the system efficiency is reduced. In addition, the no-load loss of the main engine increases, the temperature rise is fast and the working temperature is high, and the phenomenon of "cavity" is prone to occur at the oil suction end of the main pump. If the viscosity is too small, it cannot ensure good lubrication conditions of the hydraulic components, aggravate the wear of the components, increase the leakage, and reduce the efficiency of the hydraulic system. 2. Good viscosity-temperature characteristics. Viscosity-temperature characteristics refer to the degree to which the viscosity of the oil changes with temperature, usually expressed by the viscosity index. The larger the viscosity index, the smaller the oil viscosity decreases with the increase of temperature during the operation of the hydraulic system, so that the internal leakage of the hydraulic system will not be too large. The viscosity index is generally not lower than 90. 3. Good wear resistance and lubricity. The purpose is to reduce mechanical friction and ensure sufficient oil film strength under different pressure, speed and temperature conditions. 4. High chemical reaction stability, not easy to oxidize and deteriorate. Practice has proved that the chemical reaction speed is about doubled for every 10 ° C increase in oil temperature. Hydraulic oil with good oxidation resistance and stability is not prone to oxidative deterioration after long-term use, which can ensure the normal circulation of hydraulic oil.

Is a grader the same as a road roller? The difference between a grader and a road roller

Mar 29,2023

Is a grader the same as a road roller? 1. What is a road roller A road roller is a heavy-duty construction machinery, also known as a compactor. It is a kind of road repair equipment. It can be used for large-scale road construction such as highways, railways, airport runways, dams, etc. It can also be used for trench foundations, building construction, pipeline backfill, stadiums and other narrow pavement compaction operations. It is suitable for various viscous, non-viscous, asphalt concrete, sand and gravel mixture, roadbed stabilized soil and other pavement materials. Through the work of the road roller, the road material can be tighter and the road surface is smoother. Whether it is road construction or other projects that require leveling of the roadbed, it is inseparable from the general construction equipment of the road roller.

Graders are also widely used in road laying

Mar 29,2023

In the process of road laying, it is necessary to scrape the original land first, and then carry out activities such as stone paving and cement in the later stage. When the road is laid, the main equipment used is the grader. Graders still have many uses in life, especially in large-scale ground operations such as some highways and airports. With the advancement of science and technology, as well as the development of agriculture and technology in my country, mechanical equipment such as graders have been developed to a very high level. It is believed that in the near future, graders as construction machinery can be used in other fields of life and production in addition to their application in architecture.

What is a grader, the role and application field of the grader

Mar 29,2023

What is a grader Grader is a kind of earthmoving engineering machinery that mainly completes the leveling and shaping of large-area soil. Its main working device is a scraper, and it can be equipped with a variety of auxiliary devices (loosener, bulldozer, etc.) to complete multi-functional operations. In all kinds of engineering construction, the working device of the grader is flexible, with high leveling efficiency and high precision. Therefore, it has become a national defense project, road construction, mine construction, water conservancy construction, farmland improvement and other infrastructure projects for leveling and reshaping construction. Special machinery.

Excavators are in short supply in China! Some companies' exports surged by 70% in the first quarter. What are the reasons?

Mar 29,2023

Statistics from China Construction Machinery Industry Association show that in February 2023, 26 excavator manufacturers sold 21,450 excavators of various types, a year-on-year decrease of 12.4%, of which 9,958 were exported, a year-on-year increase of 34%. Double-digit rapid growth, and the export sales of excavators in the first two months also exceeded domestic sales.

What are the classifications of excavators?

Mar 29,2023

See classification of excavators: Excavator classification 1: Common excavators are driven by internal combustion engine-driven excavators and electric-driven excavators. Among them, electric excavators are mainly used in plateau hypoxia, underground mines and other flammable and explosive places. Excavator classification 2: According to the different walking methods, excavators can be divided into crawler excavators and wheeled excavators. Excavator classification 3: According to the different transmission methods, excavators can be divided into hydraulic excavators and mechanical excavators. Mechanical excavators are mainly used in some large mines. Excavator classification 4: According to the use, excavators can be divided into different categories such as general excavators, mining excavators, marine excavators, special excavators, etc Excavator - Structure An excavator consists of a bucket, bucket column, slewing arm, feet or support wheels and a hydraulic system. The bucket is hinged with the bucket column, and the bucket column is hinged at the end of the slewing arm. The hydraulic system controls the lifting and lowering of the slewing arm and the rotation in the horizontal plane through each special oil cylinder, the rotation of the bucket column in the vertical plane, the lifting and lowering of the feet, and changes the digging, lifting and unloading state of the bucket, etc., so that the bucket can excavate the earth at 3 to 4 meters above and below the ground, and unload the soil to the designated part.